Welcome Sean! It's always great when a vendor jumps in with more information on a product. As I have Shimmer and Room, and love them, I will certainly add this at some point.
 
Regards,
Dan
 

Thank you so much for your comments, Sean.
 
I am used to trying to figure out how things work through black-box analysis, rarely getting any help from the developers who actually know how they work. Your transparency - through blog and forum posts - should be an inspiration to others, many of whom would rather propagate mojo-myths than explain how something works.
 
Phase-coherency is one aspect I've never dwelt upon, because I figured it was way too complex to understand.
 
Obviously, in acoustical reverberation phase is all over the place as each reflection is delayed by different amounts. It stands to reason that this would be a huge factor in determining how the reverb wash sounds. But gosh, how does one go about analyzing it? You'd need a supercomputer to ray-trace every possible path, calculate their phase shifts, and sum them moment-by-moment. (Although analyzing a plate has got to be far, far simpler than a cathedral.)
 
And now you tell me that the speed of sound varies with frequency in a plate. This is a mind-blowing revelation. Why is that the case in steel but not in air? In all my reading on acoustics, I have never come across any reference suggesting that the SoS is not constant in homogeneous materials. You see plenty of tables that say "here's the speed in water, copper, steel" but none have a footnote saying "this is at one kilohertz only".
 
Not that I doubt it - you've ascertained it by measurement. I now see that I should be testing using different frequencies of sine waves rather than the single square wave impulse (1000 Hz) that I used.
 
Thanks again, Sean, for the information, for another great product, and (best of all for us po' folk) keeping the price down to a week's worth of peanut-butter-and-jelly sandwiches.

I'd say the most universal is Valhalla Room...

The small rooms and ambiences in Valhalla Room are a must....

clintmartin
I vote for Vintageverb.

That would be my vote as well.

Jimbo21
I demoed VVV and liked it, but to me, it wasn't different enough from Room to buy it too. Both are excellent.

Agreed. Both are excellent, and don't forget ubermod. It's one of my favorite plugins. I'm resisting Valhallaplate for now. I know the price won't change (like others) and I want to see what goes on sale in a couple of weeks. I can't believe ol'pal doesn't have any of these...I thought he had everything.

I may need the name of your "tax consultant" dude, though I doubt my wife would buy it.

Plate.......NICE!  It's now on the Lead Vocal of my next mix. 

BassDaddy
Did anybody bite on Yorolpal's "I own everything feel sorry for me" deal? If I could right now, I would order Valhalla Plate while eating Popeye's chicken. 

Bonafide!

I always felt the same about plates on other reverbs too - lots of times I thought "this is the kind of thing that needs a plate" yet when I tried the plate presets in other plugins I would be kinda disappointed, they were OK but just didn't sound like the plates I'd heard on classic records. Especially on snares and vocals. But ValhallaPlate is totally different. 

Bought it. Very nice indeed. Well worth the money.

I'm sold. It's up to Santa now. Now I know why plates have sounded like better behaved spring reverbs.